Steam-condensing system.



` Patented May 20. |902. J. u. McnAE.

STEAM CONDENSING SYSTEM.

(Application led Nov. 21, 1900. Renewed Oct. 22, 1901.)

(No Model.)

`54 Sheets-Sheet I.

5 Sheets-Sheet 2.

Patented Mayy 2o, |902'.

w 0 E E w D .ibm

Y Ill v x J. D. MCRAE.

STEAM CUNDENSING SYSTEM.

(Application led Nov. 21, 1900. Renewed Oct. 22, 1901.)

(N Model.)

N0. 700,223. Y Patented May 20, |902.

J. D. MGRAE.

STEAM CONDENSING SYSTEM.

A (Application led Nov. 21, 1900. Renewed Oct. 22, 1901.) (No Modl.) 5 Shests-Shee't 3,

No. 700,223. n 0 `Patented. May 20,` |002.l J. 0. McnAE.- j STEAM CONDENSING SYSTEM.

(Application filed Nov. 21, `1900` Renewed Oct. 22, 1901.) (No Model.) 5 Sheets-Sheet 4.v

v mzygonms 'refine co., mma-Luna. wAsHlNGToN, D. c.,

No. 700,223. Patented May 20, |902.

J. D. MCRAE. srl-:AM couosnsma SYSTEM.

(Application Sled Nov. 21, 1900. Renewed Oct. 22, 1901.)

(no Mdeml 5 sheath-sham v5.v

YN: Hemus PETER: 00,. PHOTO-urne. WASHINGTON, n. c.,

UNITED4 .STATES PATENT OFFICE.

sTEAMfcoNoz-:NSING SYSTEM.

SPECIFICATIONforming part of Letters Patent No. "700,223, dated May 20, 1902.

y Application-filed Ntvember 21,1900. Renewed October 22,1901. Serial No. 79,541. (No model.)

To all when?, it may c'ozzcejm` y Be it known that I, JOHN D MCRAE, a citizen of the United Statesyresiding at.l Oswego, Oswego county, New Yorki State, have invented certain new and usef ul4 Improvements in Steam-CondensingpSystems 5 and I do heref by declare the following to be a full, clear, and exact description of the .-inven'tion, suchas will enable others skilled'in the art to which it appertains'to make and use thesame. l

rl`his `invention relates to certaingimprovements in steam-condensing systems; and the objects and nature of my invention will be readily understood by those skilled in theartfrom the following explanations in the light of the constructionshshown in the accompanying drawings as examples,among other constructions, within the spirit andyscope of my invention., l j Y I 'My invention consists in certain novelfeatures in construction and in combinations i and' in arraugementsof'y parts, as morev fully.;

and particularlypointed ont and vspecified hereinafter. l

Referring to the accompanying drawings, illustrating for purposes of explanation constructions withinv the spirit and scope v'of my invention, Figure l is avertical central section through part of a condensing system em-v bodying my invention,`, said v'section being taken in the complete device inthe plane of the dotted line l l of the sectional view Fig.

Fig. 2 is atop plan,` partially in section, of the apparatus shown in Fig..l, the section being taken in the complete devicein the,

plane of the line 22, Fig. l. Fig. Sis a cross-y section through the complete centrifugal pump on the line 3 3, Fig. 2, looking in the direction of the arrowniu Fig. l2 and showing the pump-runner injend elevation, with its hub brokenaway to show the central waterspace into which thegsuction-t u'bes open. Fig. 4. is a detail top plan, enlarged,- of the centrifugal-,pump runner', the shelland end heads thereof being'shown in section. Fig. 5 is a cross-'section taken in the plane of the line 5 5, Fig. 2,1looking in the direction of; the arrow, Fig. 2. Fig. 6 is a detail cross-"section, enlarged, taken on the line 6.6 through one of the runner arms and tubes. Fig.` 7 is in .the nature of a diagrammatical viewillustrating the several circuit-s maintained by the lcreatesV its suction by the suction-tubes only, v

single pump. Fig. 8 is a detail vertical section through my centrifugal pump, showing a Siphon-condenser on and opening into the coupling or T instead of the jet-condenser of .thepreviousviews The pump in this view and the hollow journal is the only suctionduct of the pump. Fig. 9 is a detail vertical section through my centrifugal pump, showing the jet-condenser vof Fig. 1 in elevation, but showing the two suction-ducts to the pump entering through the same head thereof and arranged concentrically one within the other. Fig. 10 is a detail perspective View, enlarged, of the adjusting gland or sleeve within the pump-coupling for taking up wear in the packing-joint around the hollow journal of the pump-runner. Fig. 11 is an enlarged detail cross-section of the gland of Fig. l0. if

lThe condensing system generally illus- 'trated and referred to herein is peculiarly adapted for employment in localities and under conditions Where economy in the use of water is necessary, rendering it desirable to employa cooling-tower or other. means for cooling or keeping down the temperature of the water used for condensing the exhauststeam, whereby the coolingwater and the condensing or injection water .can be used over and over again or continuously practically without replenishingfrom anQoutside ,source 'or froma supply., in such systems as generally arranged heretofore it has been Ynecessary to employseveralpumps for maintaining-the circulation of the va'rious bodies of water and to raise the water to the top of the cooling-tower and in some to maintain the necessary vacuum in the condenser.

Among others, it is an important object of myinvention toprovide a condensing system wherein a single pump maintains the vacuum in the condenser and draws the coolingfwater and water of condensation .therefrom andelevates the same to thetopo'f the'colingtower .and also elevatesfthe cooling-.waterfroimrthe bottom of the cooling-tower to the top thereof to maintain the cooling circulation therein, and also maintains the circulation of the injection or condensing water, although other features of my invention are not limitedltol such a system.

IOG

Referring to the general or diagrammatical view, Fig. 7, a is a cooling-tower or other water-cooling device of any suitable or desir-- able construction.

I have not shown the specific internal construction of a cooling-tower, as such .forms no part of my invention, and I do not limit myself to any particular mechanism for cooling the water.

b is the condenser. I have shown what might beI termed a jet-condenser and have also shown a siphn-condenser in another View, but do not limit myself to any particular form or construction of condenser or device for condensing the exhaust or other steam.

As a mere example for the purposes of explanation I show a condenser composed of the closed chamber or vessel b, having the injection-pige 2 passing down through the top thereof and the proper distance longitudinally within the chamber, if such be desirable.

2 is a suitable spray or rose-head within the chamber, into which the injection-pipe discharges and which is arranged to throw a thin annular sheet or film of water radially and transversely of the chamber to the surrounding wall thereof. The steam-pipe l, as shown, discharges into the chamber above said rose-head and above the film of water discharged therefrom. The suction pipe or duct 3 to the pump opens into the bottom or lower end of the condenser-chamber below the rose-head and exhaust-steam inlet. The steam is condensed in the ordinary way by contact and intermingling with the ilm of cool water, and the combined water of con densation and injection or condensing water is drawn into the pump, as hereinafter specified.

Referring again to Fig. 7, lis the exhauststeam pipe or duct discharging into the condenser from the engine or conducting steam or vapor to be condensed from any other source.

2 is the pipe for injection or condensing water. This pipe extends from the lower end of the cooling-tower downwardly to and opens and discharges into the condenser to cause the condensation therein of the steam by any suit-able or usual means.

3 is the suction or discharge duct or pipe from the condenser to the circulating and lift' pumpe and through which the condensingwater and the water of condensation are drawn from, and the partial vacuum is maintained in the condenser by the pump.

4C is the discharge-pipe or uptake from the pump c to the top of the cooling-tower and through which all the water drawn into the pump through the ducts or channels from the coolingtower and condenser is lifted and discharged iinto the top of the coolingtower.

5 is the suction or discharge pipe from the bottom of the cooling-tower to the pump c and through which the cooling-water from the bottom of the tank passes to the pump Vthe shaft at the rate of speed desired.

and by which it is lifted through pipe fi to the top of the tower to maintain the downward cooling-passage of the water therethrough, so that the injectiolrwater for condensing passing through pipe 2 will be maintained approximately at the desired temperature for the purpose of properly condensing the exhauststeam in the condenser.

From the foregoing general description it will be observed that the single pump maintains the circulation of the cooling-water in the cooling-tower, also maintains the circulation of the injection or condensing water, and also maintains the partial vacuum in the condenser. As an example of a pump which might be employed for this purpose, I show a centrifugal pump of such novel and advantageous construction as to be peculiarly adapted for the foregoing purpose in a condensing system.

Various arrangements and constructions `of centrifugal pumps within the spirit and scope of my invention can be employed in the condensing system generally described; but as I am at present advised the form and arrangement shown in the drawings possesses many advantages in operation and economy in construction and action.

Referring to the pump illust-rated, (Z is a bed-plate, base, or frame, which can be of any suitable or desirable construction and in the present instance is arranged horizontally, with a suitably-braced upwardly-extending end web or-wall d', to which a pump-casing head is bolted or otherwise secured, as here-A inafter set forth.

cl2 cl2 are pillow-blocks or supports rigid with and extending up from the base and at their upper ends provided with suitable alinedjournal-boxes. e is the horizontal rotary-pumprunner shaft mounted in said journal-boxes. c' is the driving-pulley secured to the shaft between the journal-boxes and adapted to be coupled with the source of power for rotating The shaft and pump-runner carried thereby can be driven by belt or otherwise from a steamengine, electric motor, or any other suitable power. The shaft extends through and outwardly beyond an opening in the vertical en d wall d of the frame, and at its outer end is rigidly secured in the hub of the rotary pumprunner.

The pump-runneror rotary head comprises the central hubf, rigid with the radiating arms or bladesf,equally spaced and all of the same length. If desired, the hub and its arms can be formed of one casting. In the example shown the arms longitudinally curve outwardly and rearwardly from the hub, and each arm has a broad fiat front face and is braced or strengthened along its rear face by -a central longitudinal rib or fiange; also, in

ICO

IIO

opening through the end of the-hub opposite the shaft e'. A hollow journal g is rigidly secured in said endopening of the hub and extends outwardly therefrom concentrically with the axis on which the runner rotates. This hollow journal is formed of a straight cylindrical-'section of pipe with open ends, the inner open end opening into the water-chamber f2 of said hub. Suitable' mechanism is provided to form a water-tight joint around said pipe, rotating with the runner, and yet permit open liquid communication between said journal-pipe and a duct or passage thereto. As an example of what might be employed forA this purpose I provide a T pipe section, coupling, or casting h, arranged at the outer side of and secured to the pump-casing or a head thereof, as hereinafterv h, and hence to aid in supporting and maintaining the parts rigid I provide the rigid leg or any suitable support h', extending down from said -T to the ioor of a suitable baseabout, for instance, as shown in Fig. l. The journal-pipe g, rigid with the pump-runner, has an exteriorfdiameterless than the internal diameter of the horizontal portion of the tubular coupling h, into which it concentrically projects the necessary distance. The said journal-pipe is surrounded within said tubular coupling by any suitable packing, in which the pipe turns and which is designed to form a tight joint around the same to pre- Vent leakage between thecoupling and said journal-pipe. As an example of what might be employed for this purpose I show thejinner end of the coupling vformed w-ith an internal annular flange or Vshoulder h3, surrounding'the pipe-journal.

h4 isa cylinder sleeve v'or gland arranged longitudinally Within the coupling concentric with said journal-pipe and of such internal diameter that the end of the journal-pipe pro- -jects a short distance thereinto and turns therein. The inner Aend of said cylinder around the journal-pipe opposes and is arranged opposite the flange or shoulder h3, before described, and suitable packing material h5 surrounds an intermediate portion of theV journal pipe and is interposed and compressed between said shoulder hB and said end of said cylinder h4. Said end of the cylinder and inner edge or face of theshoulder h3 can be beveled, as usual, to force the packing to the j ournal-pipe and maintain the tight joint. It will be observed that the inner end of said cylinder h4 is open to receive the end of the pipe-journal, while the outer end thereof isclosed and arranged opposite or adjacent to the end head h2 of the coupling h. The said cylinder is held against rotation, but is longitudinally adjustable, so that the packing or joint can be adjusted to take up wear, as is ordinarily necessary in a packing-joint. Various mechanisms can be vprovided to thus hold the cylinder against rotation and yet permit longitudinal adjustment of the same. I show a notch or recess h10 cut or otherwise formed inthe end portion of the cylinder to receive the pin h6, arranged longitudinally of the cylinder and secured in the end head h2 of the coupling.` This rigid pin ttingin the recess or notch in the cylinder holds the same against rotation and yet permits the cylinder to slide longitudinally on the pin and within the coupling. l,

The means shown for adjusting the gland consists of the screw-bolt hl, screwing through a hole tapped through the head h2 and having a conical end fitting-and turning in a conical socket in the closed end of the cylinder h4, so that the cylinder canbe forced in-v Wardly by screwing in the bolt. The bolt is shown provided with a jam-nut hs at the outer face of the end head h2 for locking the bolt.

The cylinder is formed with the longitudinal slot or opening hg, registering with the suction or induction passage from the condenser- Suitable mechanism is provided to main` tain and create the suction through the hollow journal of the-runner, and hence create the partial vacuumin the condenser and draw the Water therefrom and dischargethe same centrifugally or otherwise from the .water chamber f2 and from the pump under the desired pressure. As' an example of, means IOO IIC:

which might be employedfor this purpose kI show a series of water ducts or passages ra` diating from and openinginto the water space or chamber f2, having open. outer ends discharging into the shell of the pump-casing.l

I have devisedia peculiarly advantageous construction and arrangement lof radiating liquid-passages in lconnection with the centrifugal-pump runner. `For instance, the radiating liquid-passages might Vbe formed lbyftubes, although the broadfeatures of myin-A l vention are not so limited. In this connection, c' shows suction-tubes approximately ra- Adiating from the runner-hub.- The hub-is formed with openings into the central water of the axis of the hub and runner approximately as shown in the-drawings, and lthel tubes from thence curve longitudinally rear wardly and outwardly, approximately as shown. I prefer that the tubes opening into the one central water-chamber be all of equal capacity and length and that they be equally spaced around the runner.l

A.As I am at present advised it is preferable to have the suction-tubes equal in number withv the runner arms or blades and to arrange each suction-pi pe longitudinally along the front face of a runner and conforming generally to the rearward and outward longitudinal curve of the runner-arm, with the open outer ends of the tubes slightly projecting beyond the ends of the runner-arms and out off at an angle or on a curve or arc about concentric with the axis of the runner. However,I do not desire to limit myself to these specific constructions and arrangements, although as at present advised advantages and new results are attained thereby. I f the tubes are made of suiciently strong and heavy material, it will not be necessary to secure or fasten them to the runner-arms, as the tubes will be rigidly held in place by their inner ends screwed or otherwise fastened into the runner-hub.

To increase the suction and efficiency of the tubes during the rotation of the runner, I can form the liquid passage or duct of each tube with a contracted portion t" in the form of a double cone or taper, preferably on gradual curved lines. It is preferable that this contracted portion be located at an intermediate portion in the length of the tubes, usually nearer the inlet than the outlet end of the tube. The tubes are longitudinally internally open and unobstructed throughout, except for said contracted portion of each tube, which, however, I may not nd necessary' to use in all instances, although I consider it an important improvement for certain conditions.

The pump-casing can be of any suitable and desirable construction--such, for instance, as employed in the ordinary centrifugal pump. The closed casing shown in the drawings consists of two end heads and the annular trough-like shell j, forming a water space and passage around the runner and from which the tangential discharge opens, as shown in Fig. 3, to which the discharge or lift pipe 4 is bolted or otherwise secured. This shell jis secured to and between the outer surrounding edges of the two end heads j andjz. The head 7" has the central opening through which the hollow journal g of the runner centrally passes, which opening is surrounded by the iianged neck of said head bolted or otherwise rigidly secured to the inner end of the coupling h, as clearly shown in Figs. l and 2. The opposite head ,7'2 is bolted or otherwise rigidly secured to the vertical web orwall d of the bed plate orframe and has an opening for the passage of the runner-shaft and a water-tight joint or heal'- ing js for said shaft.

l/Vhere the condensing system is such as generally shown in Fig. 7, the single centrifugal pump is provided with another suction or inlet duct and independent of the axial duct to the suction-tubes and opening into the central portion of the casing, so that the suction is created therein by the action of the runner itself practically independently of the suction tubes. In the condensing system shown this additional suction-duct connects with the pipe or connection 5 from the bottom or discharge of the cooling-tower, and said suction duct or inlet of the pump can be arranged in any suitable manner to enter the same at any suitable point.

In the specific example illustrated the end headj2 is formed with a suction orinlet duct 7o, extending laterally thereinto and then turning inwardly and opening into the central portion of the casing and around and concentric with the inner portion of the runnershaft, as more clearly illustrated in Figs. 1, 2, and 5. As shown in Fig. 2, said heady'2 is provided with an annular flange around the outer end of said suction-duct k, to which the suction-pipe 5 from the cooling-tower is bolted or otherwise secured. It will thus be observed that the suction created by the 1'0- tation of the runner-arms acts through the duct 7c and pipe 5 on the cooling-tower, and the water therefrom is drawn directly into the casing at the central portion of the runner and around thehnb thereof and is directly acted on by the runner-arms, as in the ordinary centrifugal pump, to cause the discharge of the water under sufficient head or pressure through the discharge-pipe or uptake 4t.

From the foregoing description it will be observed that the rotation of the runner at the necessary rate of speed will through the medium of the suction-tubes create suction through the hollow journal and intermediate duct and in the condenser, which will not only rapidly draw the Water from the condenser, but will also create the desirable partial vacuum therein. The water Will be discharged from the tube ends into the shell of the casing. From experience I am of the opinion that the revolving radiating tubes will create an exceedingly strong suction through the hollow journal and enable the water and air or gases to be withdrawn very rapidly and under considerable head or pressure from the condenser and that the suction will be most materially enhanced orincreased IIO head and its `armsthroughcentrifugal action on the water in the casing creates sucient pressure to force the water out through the discharge or uptake under a pressure and `head which depends on the capacityl and ef-y fit of the runner-arms within thecasingvthrough pipe 1.

heads, other conditions being'equal.

It should be noted that water is discharged into the casing-shell through and by the action of the suction-tubes and also that water is drawn into the casing through vthe independent endduct and discharged into the casing-shell by the action of the runner-arms and that these various bodies of Water are combined in the casing-shell and therein acted on by the centrifugal action of the ro- `tating runner whatever its exterior form and forced through the single or common pumpdischarge under pressure. i

From experience am of the opinion that the runner-arms coperate with the suctiontubes in creating or maintaining a comparatively high degree of suction through said tubes, which among other features renders a condensing system Within the spirit and scope of my invention of peculiar advantage and utility.

In Fig. S I show the centrifugal pump having theu suction-passages of its runner or rotary head acting through thehollow journal on asiphon-condenserb, mounted directly on and opening into the coupling pipe or duct h, as in the construction previously described. This Siphon-condenser can be of any desirable construction, with the condensing or injection water entering through pipe 2, and the steam or vapor to be condensed enters By coupling up the Siphoncondenser with my pump I'can dispense with the long leg of the siphon, as my pump creates the necessary Vacuum, which has been heretofore attained in such a condenser by a long pipe-leg, over thirty-feet in length. In the construction shown in said Fig. S the pump is formed to draw from only one source and has only one suction inlet or duct, the suction being attained through the medium of the radiating tubes. Hence the runnerhead only cooperates with the tubes and forces the water drawn through the tubes centrifugally under the necessary pressure from the pump casing through the tangential discharge shown in other views of the drawings.

VI hence showin `said Fig. 8 a narrow runnerhead having comparatively narrow runnerarmsf. The casing is correspondingly modified to receive the narrow runnerl and the end head 3'4 has no suction-duct therethrough and is secured direct tothe frame or baseplate.

with various forms of centrifugal pumpsor :with any of the forms of pump shown `or in 'the system shownin-Figfl In Fig. 9 vI show a modified arrangement of pump adapted for the system shown in Fig.v 7, but having the casing-heady'4 secured to the bed-plate and throughjwhichthe runnershaft passes without the suction-duct open- Lingtherethrough. -The opposite end head j of the casing is shown with the central opening through which the hollow journal passes, but said opening is considerably larger in internal diameter thanI the external diameter ofsaidjournal,formingasuction-ductaround d lthe same and openinginto-the pump-casing.

A pipe connection 7c is interposed between and secured to the said casing-heady" around ysaid opening and the coupling h.` The holthis view somewhat exaggerated in length for .purposes of illustration.

A Ysuction-duct is thus formed around, yethaving no liquid v communication with, said hollow journal. The cooling-water pipe 5 is shown bolted to` and discharging into said pi pels. Hence both,y

suction-ducts of the pump open through one head of the casing, and consequently it is usually desirable in this connection to form the runner-arms f4 about as shown in said Fig. 9, although the invention isnot so limited.

I donot wish to limit the broad features of my invention to the specific meansshown for -establishing suction communication in my ICO I have specifically described and clearly illustrated various features of construction for the sake of clearness in explaining various examples of condensing systems within v.the spirit and scope of my inventionybut I do not thereby wish to limit myinventionto` the features and details so setup, as it is evi-` dent various changes and modifications mlght :be resorted to in adapting my condensing system to various conditions, and hence I do IIO not wish to limit myself to the constructions setv up,^but consider myself entitled to all -such changes as fall'within the spirit and scope of my invention'.

Having thus fully described my invention,

what I claim as new,` and desire` to secure by Letters Patent of the United States, is.-

l.' A steam-condensing system Vhaving the single centrifugal pump provided with suction-pipes to the condenserand cooling-tower and a single discharge through which the water drawn from said tower and said condenser `is elevated to the top of the cooling-tower,

substantially as described. Y

denser, and a centrifugal pump included in` both the cooling-water and injection-water circuits and maintaining the circulation thereof and maintaining suction on and the partial vacuum in the condenser, substantially as described.

4. A steam-condensing system comprising a condensing-water-cooling device, a condenser, a condensing-water pipe thereto from said cooling device, a centrifugal pump havingasuction-ductopeningintothe condenser, and anothersuction-duct for the cooling-water from said cooling device, and a discharge communicating with the cooling device through which all the Water drawn from said condenser and said cooling device is forced to maintain the circulation back through the cooling device and condenser, substantially as described.

A5. I In asteam-condensingsystem, a coolingower for the condensing-water, a condenser into which the exhaust-steam and injectorwateraredischarged, and acentrifugal pump having a high suction-power duct communieating with the interior of said condenser and another suction-power duct to the cooling-tower and for the cooling-Water, and a common discharge-duct through which the water from said suction-duets is elevated back to the cooling-tower, substantially as described.

6. In a condensing system, a centrifugal pump having a case and a rotating runner y therein provided with a series of radiating axial suction-duct to the inner ends of saidH passages, a steam-condenser having its interior in direct suction communication with said duct and through the same with said passages, another suction-duct into the casing and through which suction is maintained by the centrifugal action of the runner itself, a Water connection to said duct, and a common discharge from the pump-casing, substantially as described.

7. In a condensing system, the combination of a condenser, a centrifugal pump comprising a casing having a discharge duct or opening, a rotary runner in said casing arranged to act centrifugally on the Water therein and force the same from said discharge under pressure, said runner provided with a central Waterchamber and radiating suction passages therefrom at their outer ends discharging into the casing, an axial suction journal-pipe discharging into said chamber, a suction-duct from said pipe opening directly into said condenser, and a fluid-iight packing or joint for said journal-pipe, substantially as described. 8. In acondensing system, the combination of a condenser, a cooling-tower, a centrifugal pump having a casing provided with a discharge, a rotary run ner in the casing arranged to act centrifugally on the water therein to force the same under pressure through said discharge, a suction-duct openingV into the interior of the casing and connected bya liquid-passage to said cooling-tower, said runner having a central water-chamber, radiating suction-tubes at their inner ends opening -into said chamber and at their outer ends discharging under centrifugal action into said casing, a hollow journal opening into said chamber and a suction-duct from said journal to said condenser, whereby the suctiontubes have direct suction communication with said condenser, substantially as described.

9. In acondensing system, the combination of a steam-chamber, a centrifugal pump comprising a casing and a rotary runner therein, said runner having a hollowjournal rotating therewith, and a series of radiatingsuctiontubes rigid with the runner and at their outer ends discharging into said casing and at their innerk ends having liquid and suction communication with said hollour journal, a suction-duct from said chamber to said hollow journal, and a coupling between said duct .and said journal and in which said journal rotates comprising a packing-joint within the coupling and around the journal, substantially as described.

l0. ln an exhaust-steam-condensingsystem comprising a cooling-tower and condenser, a centrifugal pump included in the cooling-water circuit and in the condensing-water circuit, in combination with suction and discharge ducts, whereby the single pump maintains the circulation of the cooling-water and the condensing-water and creates the partial vacuum in the condenser, and whereby said cooling-water and condensing-Water are both drawn into and com mingled in and discharged from the single pump, substantially as described.

11. The combination, in a condensing system, of a closed or vacuum chamber, a een trifugal pump having a casing with a discharge and a rotary centrifugally-acting runner in said casing having radiating suction-passages at their outerends discharging into the pumpcasing, an axial suction-pipe rotating with the runner and with which the inner ends of said passages have suction and liquid communication, a rigid coupling into which said pipe projects and in which it rotates, a suctionduct from said coupling to said chamber, and a packing-joint in the coupling forming a liquid-tight joint between the same and said rotating axial suction-pipe, substantially as described.

12. In combination, in a condensing system, a bed-plate, a centrifugal-pump casing secured thereto, a head of said casing having IOO ` in direct liquid and suction communication a central opening, a horizontal coupling4 closedy atits outer end and having its open inner end rigidly secured to said casing-head around said opening therein, a supportfor said coupling, a condenser-chamber rigidly4 secured on saidcoupling and having the suction opening or passage thereinto, and a rotary runner-head in said casing and creating suction through said coupling and condenser'v to draw the liquid therefrom into the pumpcasing and discharge the same therefrom under pressure, substantially as described.

13. In combination, inacondensing system, a condenser, a centrifugal pump, having a casing with a discharge, and a rotary runner having outwardlyextending suction passages discharging into the casing,a'hollow journal rigid with the runner and in direct liquid and suction communication with the inner ends ot said passages, a tube or casing with said condenser and said hollow journal and into which said ljournal extends, and a v/packing-joint in said'oasing and around said having direct liquid and suction communi journal, substantially as described.`

14. A condensing system comprising in combination, a centrifugal-pumpl shell having a fixed casing rigid with and extending laterally therefrom, a condenser. mounted on and discharging into said casing, a rotary runner in the shell having a hollow journal projecting and opening into said casing, said runner provided with suction-passages discharging into the shell and in direct suction and liquid communication with said journal, substantially as described. 15. A condensing system comprising in combination, a centrifugal-pump shell having ya fixed casing rigid therewith, a Siphon-condenseropening into said casing, arotary runner in said shell having driving means and a hollow journal extending into said casing and in direct liquid and suction communication with said condenser, said runner having suction-passages discharginginto said shell and cation with said hollow journal, whereby said runner creates the necessary vacuum in said Siphon-condenser, substantially as described.

16.. A steam-condensing system having al Vtion with saidk discharge of said condenser Y vwhereby the single pump draws the waterand vapors from saidcondenser and maintains a partial vacuum therein, substantiallyas de scribed.

18. A condensing system comprising a'cen'- f trifugal pum p having a discharge-duct,in combination with a condenser `mounted onv the pump-casing, said casing having a suctionduct from the pump in direct suction communication with said condenser, whereby the sinv gle pump draws the water and vapors from the condenser and maintains a partial vacuum'therei'n, substantially as described.

19. A condensing system comprising a cooling-device, aisteam-condenser, and asingle,

pump included in the cooling-water and condenser-water circuits and maintaining` the circulation of the water in said circuits'and the partial vacuum in the condenser, substantially as described.

20. A condensing system comprising a centrifugal pump 'having independent'suction'-` ducts and a runner creating diierent degrees of suction through said ducts, said pump having a single discharge, in combination with a f condenser in direct suction communication with one of said ducts, and a cooling device communicating with the other duct, substantially as described.

21. In a condensing system, a condenser, in combination with acentri-fugal pump havsuction communication with said condenser, whereby the single pump draws the water and vapors from the condenser and maintains the partial vacuum therein, substantially as de-4 scribed.

22. A condensing system comprising a centrifugal pump having a runner with suctionducts discharging into the pump-casing, a steam-chamber in direct suction'communication with said chamber, whereby the partial" vacuum is maintained-therein, said pumpv having another suction-duct opening through its casing independently of said runner, a wa-Y duct, said 4pump having asingle discharge,

vsubstantially as described.

v23. In ay condensing system,"the combinaing a runner with suction-ducts in direct ter-circuit maintained through saidsuctiontion with a condenser o f a centrifugal'pump in direct suction communication with-said condenser, whereby the single pump maintains the partial vacuum therein and draws the water and vapors therefrom, substantially as described.

In testimony whereof I ax my signature in presence of two Witnesses.

JOHN D. MCRAE.- Witnesses:

W. V. BURR, T. J. OURRIE. 

